Here's why...

An applet is a program, written in the Java programming language, that was designed to be run in a web browser. The browser uses an extension called
JRE (Java Runtime Environment) to run the applet. Because of security concerns, some browser makers (such as Chrome) have disabled the JRE extension, meaning those browsers will no longer run
applets that are embedded in web pages.

So now we open these applets outside of the web page, using JavaWS
(Java Web Start).

The applets are launched outside the browser, but they are unchanged, and they are still subject to the same sandbox restrictions
as when they were run within the browser. The signed certificate that you are asked to accept when opening the applet confirms that these
are the unchanged, original applets, written by us at NRRI.

When you click a link for a "jnlp" file, you will download a small app that is used to launch the applet.
("Jnlp" stands for
Java Network Launching Protocol.)

Some browsers will let you launch the app directly when the link is clicked. And all browsers will let you save these files, which you can then
open as you would any app on your computer -- even if your browser is closed!

Note: As before, you will need to have a JRE (Java Run-time Environment)
installed on your computer. You should use the most recent version of the JRE to avoid security vulnerabilities discovered in older versions.

If you need to install a JRE you can do so at
java.com.
More information on installation and troubleshooting is available on their
troubleshooting page.

Amity, Chester, Kingsbury, and Tischer Creeks

Beginning in 2002 we have been recording water quality data every 15 minutes from 4 different streams in Duluth:

Select from the following options to download a file that will launch an applet that will plot the data collected
from all of those streams for the chosen year: